Trolley-pole



(No Model.)

J. M. ANDERSEN.

TROLLEY POLE.

N0. 438,219. Patented Oct. 14, 1890.

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, mom-7K 62 10656766114 UNITED STATES ATENT OFFICE.

.JOHAN M. ANDERSEN, OF BOSTON, MASSACHUSETTS.

TROLLEY-PO LE.

SPECIFICATION forming part of Letters Patent No. 438,219, dated 0ctoberl4, 1890. Application filed July 19, 1890- Serial No, 359.460. (Nomodel.)

To all whom it may concern:

Be it known that I, J OHAN M. ANDERSEN, a subject of the King of Norwayand Sweden, but at present residing at Boston, county of Suffolk, Stateof Massachusetts, have invented an Improvement in Trolley-Poles, ofwhich the following description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

This invention has for its object to provide a strong, eflicienhandsimple trolley-pole of novel construction, as will be described, adaptedto be used in connection with the overhead system of electric railways.

My invention therefore consists in the herein-described trolley-pole, itconsisting of a tapering metallic blank bent longitudinally and havingits edges secured together, the said pole being tapered from its toptoward its bottom, substantially as and for the purposes specified.

Figure 1 in front elevation represents a trolley-pole constructed inaccordance with my invention. Fig. 2 is a detail of the metal blank fromwhich the trolley-pole is made;

Fig. 3, an end view, on an enlarged scale, of the blank shown in Fig. 2,and Fig. 4 an end View of the trolley-pole, to more clearly show themanner of forming the trolley-pole from the blank.

In accordance with my invention the metal blank (1, preferably ofsheet-steel, is made tapering, and the opposite edges or sides of thetapered blank are preferably beveled or cut away, as at a. a the bevel abeing on the under side of the blank and the bevel a on the upper side.The metal blank a is then bent longitudinally in any suitable or desiredmanner, so that the beveled edges on and (1 preferably lap over eachother, as shown in Fig. 4, and the blank thus forms a hollow taperingpole, it being considerably narrower at one end than at the other. Thehollow pole has its lapped edges a a brazed or otherwise suitablyunited. The hollow pole has secured to its upper end the usual metallicarms I), in which is journaled the usual trolley-Wheel b.

The trolley-pole, when made in one piece, as herein shown, issubstantially light, and being of tapering form the amount of metal inthe pole gradually increases from its top toward its bottom, therebyobtaining increased strength at the place desiredviz., at the j unctionof the trolley-pole with its support-the upper portion of the taperedpole containing the least amount of metal, being, therefore, very light.

My improved hollow metallic trolley-pole is substantially light, andtherefore a much lighter spring can be used to keep the trolley wheel incontact with the trolley-wire.

I prefer to bevel the edges of the blank and overlap the same,but I donot desire to limit myself in this respect, as the edges may remainunbeveled and may be butted against each other and then securedtogether.

I claim The herein-described hollow trolley-pole, it consisting of atapering metallic blank bent longitudinally and having its edges securedtogether, substantially as described.

In testimonywhereof I have signed my name to this specification in thepresence of two subscribing witnesses.

J OHAN M. ANDERSEN.

Witnesses:

JAs. H. CHURCHILL, EMMA .T. BENNETT.

